Effects of doping and temperature on nonlinearity of WO3 varistor

IMR OpenIR

	Effects of doping and temperature on nonlinearity of WO3 varistor
	Y. Wang; Z. Aburas; K. L. Yao; Z. L. Liu
	1999
发表期刊	Materials Chemistry and Physics
ISSN	0254-0584
卷号	58 期号:1 页码:51-54
摘要	In this paper, effects of some common additives, Bi2O3, Co2O3 and A(12)O(3), and temperature on nonlinearity of WO3-Na2CO3-MnO2 varistor have been studied. It is found that Bi2O3 is not helpful to improve nonlinearity of doped WO3. Doping of Co2O3 can improve nonlinearity, with alpha about 6 and breakdown field about 5 V/mm when the amount of Co2O3 is 1 mol%. For WO3-based system doped with 0.5 mol% Al2O3, the nonlinearity is improved significantly at 200 degrees C, and it is an ohmic resister at room temperature. The crystalline phases and microstructure of specimens are examined by the XRD and SEM microanalysis. It is assumed that the nonlinearsity of doped WO3 ceramics is determined by both grain boundary and WO3 grain. (C) 1999 Elsevier Science S.A. All rights reserved.
部门归属	huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china. int ctr mat phys, shenyang 110161, peoples r china.;wang, y (reprint author), huazhong univ sci & technol, dept phys, wuhan 430074, peoples r china
关键词	Doping Temperature Tungsten Trioxide Varistor Oxide
URL	查看原文
WOS记录号	WOS:000079092800009
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37524
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wang,Z. Aburas,K. L. Yao,et al. Effects of doping and temperature on nonlinearity of WO3 varistor[J]. Materials Chemistry and Physics,1999,58(1):51-54.
APA	Y. Wang,Z. Aburas,K. L. Yao,&Z. L. Liu.(1999).Effects of doping and temperature on nonlinearity of WO3 varistor.Materials Chemistry and Physics,58(1),51-54.
MLA	Y. Wang,et al."Effects of doping and temperature on nonlinearity of WO3 varistor".Materials Chemistry and Physics 58.1(1999):51-54.